If Accept is not perfect gzon will seralize the wrong thing. fix #930

Author: jknack

jooby/src/test/java/org/jooby/test/JoobySuite.java

@@ -41,7 +41,7 @@ private List<Runner> runners(final Class<?> klass) throws InitializationError {
       filter = server::contains;
     }
     String[] servers = {"org.jooby.undertow.Undertow", "org.jooby.jetty.Jetty",
-         };
+        "org.jooby.netty.Netty" };
     for (String server : servers) {
       try {
         Class<?> serverClass = getClass().getClassLoader().loadClass(server);

modules/coverage-report/src/test/java/org/jooby/issues/Issue930.java

@@ -0,0 +1,30 @@
+package org.jooby.issues;
+
+import com.typesafe.config.ConfigFactory;
+import com.typesafe.config.ConfigValueFactory;
+import org.jooby.json.Gzon;
+import org.jooby.json.Jackson;
+import org.jooby.test.ServerFeature;
+import org.junit.Test;
+
+public class Issue930 extends ServerFeature {
+
+  {
+    use(ConfigFactory.empty().withValue("application.env", ConfigValueFactory.fromAnyRef("prod")));
+    use(new Gzon());
+  }
+
+  @Test
+  public void gzonRenderJsonWithWideAcceptIsPresent() throws Exception {
+    request()
+        .get("/930")
+        .header("Accept", "application/json, */*")
+        .expect("{\"message\":\"Not Found(404): /930\",\"status\":404,\"reason\":\"Not Found\"}");
+
+    request()
+        .get("/930")
+        .header("Accept", "application/json")
+        .expect("{\"message\":\"Not Found(404): /930\",\"status\":404,\"reason\":\"Not Found\"}");
+  }
+
+}